Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) — Question 391

Which three OSPF parameters must match before two devices can establish an OSPF adjacency? (Choose three.)

Answer options

• A. IP address
• B. subnet mask
• C. interface cost
• D. process ID
• E. area number
• F. hello timer setting

Correct answer: B, E, F

Explanation

The correct parameters that must align for OSPF adjacency are the subnet mask, area number, and hello timer setting. The subnet mask ensures the devices are on the same network segment, the area number ensures they belong to the same OSPF area, and the hello timer setting must match to maintain neighbor relationships. IP address and interface cost do not need to match, and the process ID is relevant only to the local router's configuration.